About Us

Faculty & Staff

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Our dedicated faculty and staff are the heartbeat of our school.

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Head of School

Kathy Chumas

Kathy received her Bachelor of Science in Physical Education/Health and Fitness from Frostburg State University and completed her Master of Science in Occupational Therapy at Shenandoah University. She is a registered and licensed occupational therapist (M.S. OTR/L). Kathy began working at The Diener School in 2007. Prior to becoming Head of School in 2019, she served in a variety of roles at Diener including Occupational Therapist and Director of Admissions & Therapeutic Support. In pediatric clinical settings, Kathy has performed assessments and developed occupational therapy treatment plans for children with a variety of diagnoses including sensory processing disorders, developmental delays, and communication disorders. Kathy has attended various workshops on cutting-edge treatment strategies for children diagnosed with ADD/ADHD, visual processing disorders and language-based challenges. A sample of trainings include: Sensory Integration, Anxiety Among Children, Learning without Tears, Zones of Regulation, Social Thinking, and Executive Functioning Strategies for Educators.

Administrative & Leadership Team

Diener Staff Christine

Assistant Head of School

Kristine Manlove-Casa

Kristine holds a Master of Science in Education with a concentration in Teaching Students with Special Needs from Kaplan University (2011), and a Bachelor of Science in Business Administration from Wesley College (2009). Since joining The Diener School in 2011, she has served in a variety of key roles including Lead Teacher, Learning Skills Specialist, Director of Curriculum & Instruction, and Director of the Middle School—where she played a pivotal role in its development and launch. Now serving as Assistant Head of School, Kristine brings a wealth of experience and a deep commitment to supporting diverse learners. She is a Certified Executive Director and a certified Phono-Graphix Tutor, and she actively pursues professional development in areas such as Orton-Gillingham, Executive Functioning, Kinesthetic Learning, Teaching the Anxious Child, Reading Comprehension Strategies, Phonics and Spelling Instruction, and Number Sense Foundations. Kristine is also a certified trainer in CPI Nonviolent Crisis Intervention, underscoring her dedication to fostering safe, supportive, and inclusive learning environments for all students.

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Director of Development

Laurie Aaronson

Laurie has been a member of the Diener Team since 2009. Laurie studied Business Administration and Paralegal Studies at the University of Maryland University College and brings a wealth of hands-on experience to her leadership role at Diener. Over the years, she has worn many hats, beginning as Office Manager and later serving as Director of Operations and Development. Now, as Director of Development, Laurie brings her passion for people and community-building to the forefront, building strong connections across the Diener community. She also leads all of the school’s fundraising efforts, overseeing campaigns and donor engagement to help support Diener’s continued growth. With a warm, approachable style and a deep dedication to Diener’s mission, she cultivates lasting relationships with families, alumni, and community partners. Her work is instrumental in fostering connections that support the school’s growth and long-term success.

Lois McCabe, Director of Admissions at The Diener School Bethesda, Maryland

Director of Admissions

Lois McCabe

Lois became the Director of Admissions at Diener when we opened our doors in Fall 2007. She then stepped into the role of Head of School from 2013-2016. After a brief absence, she returned in 2019 to take on her current role as Director of Admissions. Lois earned her Bachelor’s Degree from American University and her Law Degree from Temple University. Lois has been advocating for special needs families for over two decades. She became a Special Education Advocate for Children in the D.C. Superior Court Family Services where she managed cases which involved advocating for children with special needs through school visits, IEP meeting, school placement, and due process hearings. Lois also worked as a special education consultant providing professionals and parents with pragmatic information regarding the ever-changing needs, issues, and options facing the special needs community.

Alicia Evers

Advancement Coordinator

Alicia Evers

Alicia joined The Diener School community in the fall of 2019, bringing with her a strong foundation in human development and family studies. She attended Penn State University, where she cultivated her passion for supporting children and families. Before joining Diener, Alicia lived in Erie, PA, where she spent four years working and ten years volunteering at the Highmark Caring Place—a grief center dedicated to helping children, adolescents, and their families navigate the challenges of loss. She also gained valuable experience at the Barber National Institute, serving in various roles including special education para-educator in classroom settings and administrative assistant in the Adult Day Program. In addition to her extensive experience, Alicia is a Certified Medication Technician and is trained in First Aid and CPR, further enhancing her ability to support students’ well-being and safety. Alicia’s diverse background, professional training, and compassionate nature make her a valued and trusted member of the Diener team.

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Director of Curriculum & Instruction

Nicole Tanjutco

Nicole holds a Bachelor of Science in Elementary Education (2014) and a Master of Science in Instructional Design and Curriculum Development (2022), both from Towson University. She began her career in education in the public school systems of Baltimore County and Montgomery County before joining The Diener School in 2015 as a teaching assistant. Within a year, she advanced to lead teacher and later became the Middle School Learning Skills Specialist, a role she held until 2023. Now serving as Diener’s Director of Curriculum and Instruction, Nicole brings a deep understanding of individualized learning, instructional planning, and teacher development. From 2019 to 2022, she also led the school’s summer program as Camp Director. In addition to her leadership roles, Nicole established and advises the Student Government, promoting student voice, leadership, and community engagement. She also leads Diener’s mentorship program for new teachers, providing ongoing guidance and professional development to support their growth and successful integration into the school community. Nicole’s professional training includes executive functioning strategies, Multisensory Math, Phono-Graphix, IMSE Intermediate Orton-Gillingham, Orton-Gillingham Plus, StudySync, Learning Ally, and Fast ForWord. She is also certified in CPI Nonviolent Crisis Intervention and trained in transformational leadership, group dynamics, and project management. Nicole was a participant in the AIMS Emergent Leader Seminar, where she deepened her leadership capacity and strategic perspective within independent school education. As Chair of Diener’s AIMS Accreditation Steering Committee, she is committed to continuous school improvement and maintaining high standards of educational excellence.

Lindsey Menard Middle School Learning Skills Specialist at The Diener School, Betheda, Maryland

Middle School Learning Skills Specialist

Lindsey Menard

Lindsey earned a dual bachelor’s degree in English and Education from Bucknell University. She began her career in education working with as a one-to-one in Washington, DC, using targeted reading interventions to help struggling readers K-3. In 2021 she started at the Diener school while pursuing her Master’s Degree in Special Education at American University. Since then she worked as both a Teaching Partner and a Lead Teacher before moving into the role of Learning Skills Specialist for the Middle School. She is excited for another great year at Diener!

Katelen Muriel Diener School Staff Elementary School Learning SKills Speclialist

Elementary School Learning Skills Specialist

Katelen Muriel

Katelen earned an undergraduate degree in Psychology and a master’s degree in Multicultural Special Education from the College of Mount Saint Vincent. Katelen started at Diener in Fall of 2019 as a teaching partner and, after a year, was promoted to a Lead Teacher/Science Teacher position for the middle school. After several years of teaching the oldest class, Katelen transitioned into the role of Learning Skills Specialist for the elementary school, bringing her expertise back to the younger students. As a Learning Skills Specialist, she supports students in building foundational math and reading skills, improving self-regulation, and strengthening core academic strategies through targeted interventions and individualized support.Before starting at the Diener School, Katelen lived in New York City, working as an ABA therapist at the Center of Autism and Related Disorders. She gained 2 years of experience applying behavioral analysis principles with children and adults who have ASD. Katelen has training and certifications in executive functioning strategies, Multi-sensory Math, Social Thinking, Reading Intervention, Cardiopulmonary Resuscitation (CPR), Automated External Defibrillator (AED), first aid, and CPI Nonviolent Crisis Intervention.

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Building Engineer

Marcus Scott

Marcus Scott is a dedicated building engineer with a diverse background in facilities management. Prior to specializing in engineering, Marcus held a multifaceted role at a law firm, ranging from reception to law librarian. His experience in both environments has equipped him with a unique perspective on problem-solving and project management.

diener school staff 2025 26 Lissa August

Bookkeeper

Lissa August

Lissa has been part of the Diener family since it opened its doors in 2007. Her son, Tyler, was one of the original five students to attend Diener. She received her Bachelor of Science in Civil Engineering from Tufts University. Lissa works in the finance department, where she helps keep the school’s financial operations running smoothly. She helps manage budgeting, financial reporting, and day-to-day accounting functions that ensure the school’s resources are used effectively to support its mission. Lissa enjoys making sure resources are well cared for so teachers and students can focus on learning. With a strong background in bookkeeping, Lissa brings both technical expertise and a commitment to accuracy, transparency, and collaboration.

Lead Teachers & Teaching Partners

Jenni Cook Lead Teacher photo for Diener School Staff Bethesda, Maryland

Lead Teacher

Jenni Cook

Jenni obtained a Bachelor’s degree in Elementary Education from Pennsylvania State University in 2000 and completed her Master’s degree from Johns Hopkins in Early Intervention Special Education in 2009. Jenni joined The Diener School in 2009 and has held a variety of positions while at Diener including Elementary School teacher, Learning Skills specialist, and Director of the Lower School. She returned to the classroom in 2017 to work more directly with students and capitalize on her considerable skills as an educator. Jenni has been trained in The Character Education Virtues Project, Zones of Regulation, Social Thinking, Multi-sensory Math, Phono-Graphix, Read Naturally Fluency Program, and Orton-Gillingham.

Becky Flaherty Diener School Teaching Partner

Teaching Partner

Becky Flaherty

Becky received her Bachelor of Arts in Justice and Law from American University in 2022. Before Diener, she worked as a Teaching Assistant at Georgetown Day School, primarily in the Elementary School division. Becky has a passion for working with children (and adults!) with Autism Spectrum Disorder. Becky also completed a service year through Americorps City Year, where she worked at MLK Jr. Elementary School. There, she led both academic and behavioral small group interventions in her 5th-grade class. Becky is a classical flutist, and extremely musical. One of her favorite teaching memories was leading the student Drumline at MLK Jr. and introducing her students to music from around the world.

Cyd Igot, The Diener School Bethesda, Maryland Teaching Partner

Lead Teacher

Cyd Igot

Cyd Igot joined The Diener School in the 2022–2023 school year as a Teacher Partner and has since transitioned into a Lead Teacher role. She holds a B.A. in Behavioral and Social Sciences from the University of Maryland, with a major in Sociology and a minor in Women’s Studies. Cyd’s passion for working with children began through roles as a Kaplan tutor, an ESL teacher in Santiago, Chile, and a homeschool teacher for the Assisi Bridge School Co-op. She has also worked in mental health, supporting young people with persistent mental illness. Outside the classroom, Cyd is the founder of A Letter For You, a project sharing thousands of anonymous handwritten letters to uplift those going through hard times. She gave a TEDx Talk on the project in 2016 and published A Letter For You: A Collection of Handwritten Letters for Survivors in 2020. Cyd has also been involved in disaster relief efforts in the Philippines and remains committed to empowering others. In her free time, she enjoys salsa dancing, traveling, and finding ways to make a difference.

Kathy Koetz, The Diener School Bethesda, Maryland Lead Teacher

Lead Teacher

Kathy Koetz

Kathy Koetz holds a Bachelor of Science in Adolescent English Education from Long Island University and a Master of Fine Arts in Writing from Lindenwood University. After graduation, she published a children’s book, Rosie’s Rescue Ranch, in 2019. While attending college in New York, Kathy gained valuable experience working at MercyFirst, a human and social service agency in the New York metropolitan area. She completed her student teaching at P256Q, a middle and high school program on the MercyFirst campus. She also volunteered to facilitate a therapeutic reading program for MercyFirst’s child psychologist. Kathy’s professional journey includes her current role as a middle school teacher at Diener School, where she began in the 2020-2021 school year, and her previous position teaching Special Education at The Lourie Center in Rockville, MD.

diener school staff 2025 26 Kendra Lane

Lead Teacher

Kendra Lane

Kendra graduated from the University of Maryland with a double degree in Neuroscience and Child Psychology. She earned her Master’s in Leadership in Special Education from Notre Dame of Maryland University and is currently pursuing her second Master’s in Applied Behavioral Analysis from the University of Cincinnati. After undergrad, she spent a few years in Maui, Hawaii, conducting marine biology research on humpback whales and working as a naturalist. Upon returning to her home state of Maryland, Kendra began pursuing her career in education. She started as a lead preschool teacher before transitioning into an assistant upper elementary teacher at Butler Montessori. For several years, she taught high school special education at Sheppard Pratt. Kendra also works part-time as a registered behavior technician, bringing years of ABA experience and a passion for working with all age groups. This is Kendra’s third year teaching at The Diener School, where she teaches Middle School Language Arts and the entire Middle School Social Studies program. She is thrilled to continue being part of the Diener community.

diener school staff 2025 26 Michelle Mahon

Lead Teacher

Michelle Mahon

Michelle joined The Diener School team in the fall of 2022. Prior to this, she co-led the second-grade class at The Maddux School and has been pursuing additional coursework toward a second Master’s degree in Special Education. Michelle holds a Master of Science in Counseling Psychology from Northeastern University. She is certified in the Handwriting Without Tears program as well as the Orton-Gillingham Reading and Writing Approach. With over 16 years of teaching experience, Michelle began her career in a nursery school setting before spending the past 14 years at The Maddux School. She has completed specialized training in The Maddux School’s Social Learning Curriculum and is recognized for her expertise in creative arts and curriculum integration.

diener school staff 2025 26 Franny McHale

Lead Teacher and Social Studies Teacher

Franny McHale

Ms. Franny has been part of the Diener community since 2022. She earned her degree in Early Childhood Education in Ohio and went on to receive her Master’s in Learning Disabilities from American University in Washington, DC, in 2020. Before joining Diener, she taught at an inclusive preschool. At Diener, she teaches Social Studies to elementary students and leads a small academic group. She is also known for supporting various classrooms throughout the day wherever an extra hand is needed. Ms. Franny is passionate about building strong relationships with students so they feel comfortable, confident, and excited to learn and try new things. Outside of school, she enjoys spending time with her dog Gouda, being outdoors, and exploring new places. She also has extensive experience teaching swim lessons and helping children feel safe in the water, as well as providing both adaptive and non-adaptive ski instruction to children and adults.

diener school staff 2025 26 Luccas Medina

Teaching Partner

Lucas Medina

Lucas received his Bachelor of Science in Business Administration in 2012 from Shepherd University, Shepherdstown, West Virginia. He began his teaching career in 2016 for Montgomery County Public Schools at Loiederman Middle School working with English language learners. He slowly extended his role and began assisting within the Special Education program at Loiederman after a few months. Lucas is also an experienced soccer coach and has trained with multiple teams of various age groups in the Metropolitan area. He currently works with former professional DC United legend, Luciano Emilio (Luciano Emilio Soccer Club). Lucas has been a Teaching Partner at The Diener School since February 2023.

diener school staff 2025 26 Dani Oakley

Lead Teacher

Dani Oakley

Dani earned a Bachelor of Science degree in Special Education and Elementary Education from Indiana University – Bloomington in 2019. Dani also completed a master’s degree program in Special Education-Autism Spectrum Disorder in December of 2023. She joined Diener in Fall 2019 as a Teaching Partner and is now a Lead Teacher. She has her teaching license in grades K-6 for general education and special education and is trained in the multi-sensory Orton-Gillingham phonics curriculum. She is excited to be returning to Diener for another great school year!

diener school staff 2025 26 Emily Pasquale

Teaching Partner

Emily Pasquale

Emily earned an undergraduate degree in Psychology with a minor in Art from Wagner College and a master’s degree in Clinical Mental Health Counseling from the College of Staten Island. Prior to joining the Diener School team, Emily completed field placements in New York at P.S. 57 and the Wagner College Early Childhood Center, private tutoring, and worked at a daycare where she did small group instruction with children with special needs. Emily’s background in the mental health field has given her great insight into childhood development and learning disorders, allowing her to readily recognize the unique needs of each child in the classroom and beyond. Emily is professionally certified to work with children with neurodevelopmental disorders. She has been a Teaching Partner at The Diener School since Fall 2024. Emily is excited to be returning to Diener for her second school year.

diener school staff 2025 26 Amanda Sickel

Lead Teacher

Amanda Sickel

Amanda earned a Bachelor of Science in Psychology from McDaniel College and holds two Master of Science Degrees in Behavior Analysis from The Chicago School of Professional Psychology and in Special Education from McDaniel College. Amanda has spent many years in the classroom working with students in various capacities including, most recently, at the Auburn School where she taught Middle School math and science. She has also provided one-on-one services to students in a school and clinic setting prior to the start of her teaching career. Amanda has training in executive functioning skills, multisensory math, the Social Thinking Curriculum, and Positive Behavior Intervention Support. She is looking forward to getting to teach science in the new science lab this year!

diener school staff 2025 26 Jennifer Simpson

Teaching Partner

Jennifer Simpson

Jennifer has a Master of Science in School Counseling from Johns Hopkins University and a Bachelor of Arts in Psychology from Dickinson College. Prior to working at Diener, Jennifer worked for 5 years at Ivymount School and 16 years at The Maddux School. She has worked with Pre-K through 2nd-grade students and enjoys supporting students, families, and teachers wherever most needed. Jennifer began at the Diener School in Fall 2022.

diener school staff 2025 26 Natalie vernigor

Teaching Partner

Natalie Vernigor

Natalie Vernigor joined the Diener team during the 2024-2025 school year. Natalie holds a Bachelor of Psychology from the University of Maryland Baltimore County and plans on pursuing a graduate degree. She discovered her passion for teaching while working with Identity, Inc., a non-profit organization dedicated to supporting students with both academic and social skill challenges. Prior to this, Natalie gained valuable experience as a paraeducator at Mill Creek Towne Elementary with Montgomery County Public Schools. Natalie is super excited for the upcoming school year and looks forward to contributing to the Diener community!

diener school staff 2025 26 Sabrina Wasfi

Lead Teacher

Sabrina Wasfi

Sabrina received her Bachelor of Science degree in 2017 from Frostburg State University with a major in Ethnobotany and minors in Anthropology and Forestry. She is currently finishing a master’s degree in teaching for Special Education Early Childhood from Liberty University, with plans to graduate in August 2025. After graduating undergrad, Sabrina transitioned to environmental education through Delaware State Parks and the Howard County Nature Conservancy. That experience allowed Sabrina to identify her true passion, working with kids, so she decided to pursue the education field. Sabrina worked with preschoolers for 5 years before transitioning to elementary special education for the past 2 years. She is certified in CPI Nonviolent Crisis Intervention, FBA Functional Behavior Assessment & BIPs Behavior Intervention Plans, and Positive Behavior Interventions, Strategies, & Supports. She looks forward to returning to the Diener team for another year!

diener school staff 2025 26 Eva Whitaker

Teaching Partner

Eva Whitaker

Eva graduated from American University in 2024 with a degree in Elementary Education. During her final semester, she interned at The Diener School, where she gained invaluable experience in creating multisensory lessons and supporting each student’s needs. She is pursuing her master’s degree in special education at American University. Eva enjoys bringing energy and positivity to the learning environment and is eagerly anticipating a fantastic year ahead at The Diener School!

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Teaching Partner

Bernina Woodson

Bernina is a professional Associate Teacher with over fifteen years of experience working in early childhood settings, including nine at The Maddux School. She has extensive experience tutoring and coaching vulnerable children and adults and has a particular passion for guiding the development of play and social skills in young children. Bernina holds a Graduate Certificate in Autism Spectrum Disorders from George Washington University and earned a Bachelor of Science in General Studies with a concentration in special education, education, and psychology from Liberty University.

diener school staff 2025 26 Ryan Elias

Lead Teacher

Ryan Elias

Ryan received her BA in Art History from Scripps College in Claremont, CA, and her MSEd in Early Childhood General & Special Education from Bank Street College of Education in New York, NY. Ryan has been a classroom teacher since 2006 and a private tutor since 2020. She has formal training in Orton-Gillingham, Project Zero, and yoga and mindfulness for children. Ryan joined Diener in spring of 2025 and is thrilled to be part of the community!

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Part-time Lead Academic Instructor

Spencer Beck

Spencer holds graduated Magna Cum Laude with a degree in Special Education from Texas State University. He began his career as a paraprofessional, next becoming a Lead Resource/Inclusion Teacher—first at the elementary level, then in middle school. He returned to his hometown of Montgomery County last year. Spencer is passionate about Differentiated Instruction and creating inclusive, student-centered learning environments.

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Lead Teacher

Amber Eby

Amber joined Diener for the 2025-2026 school year. She earned her Bachelor’s degree in Liberal Arts from Sarah Lawrence College. Following her undergraduate studies, she was accepted into the NYC Teaching Fellows program, where she served as a special education teacher for three years, working in NYC public schools in the Bronx. During this program, Amber earned her Master’s degree in Teaching Adolescents with Disabilities from St. John’s University. In 2019, she returned to the DC area, where she served as a special education teacher and AP English Literature teacher at KIPP DC and DCPS. In addition to teaching, she has also served as a special education coordinator and transition coordinator for secondary students with disabilities. She has also mentored aspiring teachers through Teach for America. Amber loves watching her students grow into confident learners ready to lead choice-filled lives each school year.

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Teaching Partner

Elizabeth Kent

Elizabeth (Liz) Kent was born and raised in Potomac, Maryland. She grew up horseback riding, hiking, and has recently, over the past few years, picked up running. Graduated from Muskingum University in New Concord, Ohio, in 2010 with a dual bachelor’s degree in Child and Family Studies and Sociology, and minored in Psychology. Shortly after graduating, Elizabeth got certified as a therapeutic horseback riding instructor in Temple, New Hampshire. Elizabeth became a preschool teacher for both private schools and the GAO Child Development Center. After working in preschools, Elizabeth noticed that some children were not meeting their milestones and developmental progress, which inspired her to seek further training. In 2021, Elizabeth became a Registered Behavior Technician (RBT) and began graduate studies at George Mason University in January 2022. She earned her graduate diploma and a certificate in Applied Behavior Analysis in 2023. Currently, she is accruing supervised hours toward becoming a Board Certified Behavior Analyst (BCBA) and works as a Teaching Partner at The Diener School.

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Lead Teacher

Conor Morey-Barrett

Conor began teaching at The Diener School in 2025. In 2019, Conor earned his Master’s of Education from the University of Massachusetts Boston. He also holds a Bachelor of Fine Arts in Painting. Prior to coming to Diener, Conor worked as a History and Humanities teacher at Dearborn Academy, an independent special education school serving students with OCD, anxiety, and executive functioning challenges. His combined educational background has led Conor to focus on inclusive, creative, and flexible approaches to learning centered on the whole child. Conor recently moved with his family to the DMV from the Boston area. He enjoys hiking, museums, and taking his kids to fun outdoor activities.

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Part-time Lead Academic Instructor

Katie Roe Iversen

Katie received her Bachelor of Science in Sociology Based Human Relations from Connecticut College, and she holds a Master’s Degree in Teaching Reading and a Multiple Subjects teaching credential from the University of San Francisco. She has worked in both public and private schools in San Francisco, Charlottesville, and New York City. After taking some time off to stay home with her three sons, she returned to work part-time at Positive Development, where she worked one-on-one with children to help them develop communication, social, and daily living skills.

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Teaching Partner

Hannah Scofield

Hannah earned her Bachelor of Science in Psychology with an emphasis in Child and Family Psychology, along with minors in Biology, Sociology, and Women’s Studies, from Frostburg State University. During her undergraduate studies, she completed an internship with the YMCA Teen Parent Program, supporting early childhood development. After graduation, Hannah worked as a Registered Behavior Technician at Ally Behavior Centers and later as a Special Education Paraeducator with Montgomery County Public Schools. While working in the school system, she earned her Master of Science in Educational Psychology from Purdue University Global. Her background in both clinical and classroom settings has shaped her passion for supporting neurodiverse learners. Hannah is eager to get to know her students and to contribute to the Diener community.

Therapeutic & Specialists Team

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Behavioral Assistant & Social Skills Support

Tatiana Francisco

Tatiana began her Diener journey in 2017, completing a semester internship, and in 2018 transitioned into a full-time Teaching Partner. She spent five years in this role before becoming a Lead Teacher for two years. Building on that experience, she now serves as a Behavior and Social Skills Support Specialist, where she combines her passion for student growth with her expertise in behavioral strategies. Tatiana earned her Bachelor of Science in Family Science from the University of Maryland in 2017 and her Master’s Degree in Special Education with a concentration in Applied Behavior Analysis from Arizona State University in 2022. She is currently working toward obtaining her BCBA certification. She has extensive training in Social Thinking, Multi-Sensory Math, IMSE Orton-Gillingham, Applied Behavior Analysis, and CPI Nonviolent Crisis Intervention. Tatiana is committed to helping students build the academic, social, and emotional skills they need to thrive.

diener school staff 2025 26 Kayla Dunn

Speech Language Pathologist

Kayla Dunn

Kayla started her Diener journey during the 2017-2018 school year as a teaching partner before leaving to pursue her Masters of Speech and Language Pathology from the University of Maryland. Before making her way back to Diener in 2024, Kayla worked as an SLP in Montgomery County Public Schools as well as with adults in a skilled nursing facility. During her time in MCPS, Kayla worked closely with students and families in order to establish foundational language skills as well as social skills in individual, small group, and whole group settings. Kayla is excited to rejoin the Diener family and is passionate about providing functional, evidence-based services to her students.

Dr. Joy Kolb Licensed Psychologist, The Diener School Bethesda, Maryland

Licensed Psychologist

Dr. Joy Kolb

Dr. Joy Kolb has been consulting with families and schools for over 20 years. She is a licensed psychologist and board-certified behavior analyst in private practice in Gaithersburg, MD. Dr. Kolb’s treatment focuses on providing evidence-based strategies and manageable recommendations that can be applied to each setting. Her treatment emphasizes realistic interventions that are individualized to the unique needs of each student. Dr. Kolb’s clinical interests include individual treatment as well as providing trainings for caregivers and school staff.

diener school staff 2025 26 Sarah Michael

Speech Language Pathologist

Sarah Michael

Sarah joined The Diener School in 2024, bringing with her over 15 years of experience in speech-language pathology. She earned her master’s degree in Speech-Language Pathology from the University of Maryland and holds a minor in linguistics, enhancing her expertise in language structure and development. Sarah began her career in public schools, working with students from early childhood through middle school, and later provided individualized therapy in a private practice setting. She is a licensed speech-language pathologist in Maryland and holds the Certificate of Clinical Competence (CCC-SLP) from the American Speech-Language-Hearing Association. Her experience spans working with children as young as six months to young adults up to age 21, addressing a wide range of speech and language challenges. Sarah is passionate about fostering communication skills through collaboration with students, families, and colleagues, and is proud to be part of the Diener community.

diener school staff 2025 26 Sammi Rosenfeld

School Counselor

Sammi Rosenfeld, MD LCPC/DC LPC, NCC

Sammi joined our Diener community in 2020. She is the School Counseling supervisor and supports K-8. Sammi received her BFA with high honors in Dance with a minor in Kinesiology from the University of Michigan and her M.S.Ed with high honors in School and Mental Health Counseling from the University of Pennsylvania. She is a Licensed Clinical Professional Counselor in both Maryland and Washington, DC, and is also a National Certified Counselor. She is also a Certified Clinical Trauma Practitioner and is a trained SPACE provider. She uses her professional dance background, experience as a school counselor at a Title 1 Philadelphia public school, and studies in play and expressive arts therapies to inspire her current therapeutic approach. Sammi brings the experience she gains from her private practice and dance classes she leads into her work with Diener students every day. Sammi teaches weekly SEL classes to every grade at Diener to help the students navigate our world safely and with enthusiasm. She supports students with their individual needs and leads counseling groups. She is grateful to be a part of the Diener community.

diener school staff 2025 26 Laurie Schneider

Board Certified Behavior Analyst

Laurie Schneider

Laurie is a licensed and board-certified behavior analyst with 8 years of experience using ABA strategies to support children with diverse needs. She grew up in Berlin, Germany and in 2015 received her Bachelor of Science in Psychology from the University of Hamburg. She moved on to getting her master’s from Ball State University in Applied Behavior in 2017, while working as a registered behavior technician (RBT) in a clinical setting in Texas. She loved working 1-on-1 with autistic children and using child-centered, play-based strategies to help them achieve their social, emotional and adaptive goals. Laurie earned her BCBA certification in February 2018 and went on to be a Case Supervisor, where her roles shifted to completing assessments, developing individualized, comprehensive treatment plans, training technicians and providing guidance to caregivers. Laurie also has multiple years of experience working as Behavior Specialist in Texas public schools. In that role, she has trained administrators and teachers on how to use least-restrictive and evidence-based strategies to support student behavior in a variety of classroom models. As a Behavior Specialist, Laurie was a trainer for the district in non-violent crisis intervention, behavioral interventions, classroom management and trauma-informed practices. Before relocating to Maryland, Laurie worked as Assistant Clinical Director for an ABA clinic and worked to gain more experience with assent-based and neuro-divergent affirming practices in ABA. Laurie whole-heartedly believes in Ivar Lovaas’ quote: “If they can’t learn the way we teach, we teach the way they learn”. She is excited to join the Diener team this year that works hard to ensure that every student gets what they need to succeed.

John Soares, The Diener School Bethesda, Maryland

Adaptive Physical Education

John Soares

Coach John graduated from the University of Maryland in 2007 with a Bachelor of Science degree in Nutrition Food and Sciences. He continued his education at Montgomery College to pursue an advanced degree in Early Childhood Education. John worked at MoCo Movement Center Pediatric Therapy Gym as a Movement Coach and he brings his creativity and enthusiasm to the Diener team. He is also a dedicated soccer coach for the MSI Soccer League and is currently working for the former MLS MVP Golden Boot winner Luciano Emilio Soccer Club. John has been the Fitness Instructor at The Diener School since 2016.

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Behavioral Assistant & Social Skill Support & Camp Director

Sean Strumpf

Sean joined our Diener team in 2016 as a Teaching Partner. For the past few years, he has been in the position of Behavioral Assistant and Social Skills Support. Additionally, Sean was the Director of our 2023 summer camp program. He earned an Associate of Arts degree from Montgomery College in 2012. He worked as a special education para-educator for Montgomery County Public Schools from 2014-2016. In addition, from 2015 to the present, he works at Changing the Lives of Children with Autism (CLCA) as an intensive individual support technician. He holds multiple certifications, which include: CPI Nonviolent Crisis Intervention; Prevention and Management of Aggressive Behavior (PMAB); Cardiopulmonary Resuscitation (CPR) and Automated External Defibrillator (AED); and First Aid.

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Certified Occupational Therapy Assistant

Paris Woolford

Paris received her Bachelor of Science in Exercise Science and a minor in Dance from Old Dominion University in 2016. She received her Associate of Applied Science as an Occupational Therapy Assistant from Eastern Virginia Career College in 2019 and completed her Level II Fieldwork at The Lab School of Washington. At the Lab School, Paris provided interventions to middle school-aged children in study skills, functional independence, self-regulation, and executive functions to students with ADHD, various learning disabilities, and anxiety. Paris joined Diener in Fall 2021 working closely with our Middle School students and enjoys collaborating with our staff.

diener school staff 2025 26 Sam Goldberg

School Counselor

Sam Goldberg, LGBC

Sam officially joined the Diener team as a Professional School Counselor in 2024 after serving as Diener’s very first School Counseling intern the previous year. He is a Maryland Board Certified School Counselor, and a Licensed Graduate Professional Counselor in the state of Maryland. In addition to his more traditional titles, Sam holds a certification as a Therapeutic Game Master, and is trained in utilizing tabletop role-playing games as vehicles for delivering therapeutic interventions. Accordingly, he often incorporates imaginative play and low-stakes, gamified psychoeducation into his individual and group counseling to keep students engaged and excited about their own social-emotional development. Before joining UMD’s School Counseling Program, Sam served as a special education paraeducator in both public and private school settings for a total of three years, where he leveraged his background in philosophy to help students discover their own capacity to ask questions, make meaning, and engage in dialogue. He believes that all students deserve to be taken seriously as thinkers and citizens of the world, and is excited to support Diener’s students through moments of self-discovery and experiential synthesis.

diener school staff 2025 26 Katy Vilardo

Cooking Instructor and Substitute Teacher

Katy Vilardo

After spending over a decade working at Marriott Headquarters, Katy made a career shift to focus on community-centered work,a journey that led her to The Diener School. For the past five years, she has been part of the team in a part-time role that allows her to support the school in a variety of ways. Katy serves as both a short- and long-term substitute, helps the youngest students acclimate to school life, and is always ready to jump in wherever she’s needed.

One of Katy’s favorite roles at Diener is teaching cooking. Over the years, she has created a fun and welcoming kitchen environment where students feel empowered to try new things, build confidence, and celebrate their success, both in and out of the kitchen. With a dedicated food lab, she has been able to expand the cooking curriculum and is excited for what’s to come.

Outside of Diener, Katy is passionate about her work with Caring Matters, where she facilitates children’s bereavement groups (Good Grief Clubs) in Montgomery County Public Schools. In her free time, she enjoys cooking for friends and family, spending time on Cape Cod, and being with her partner, their cat Otis, and their dog, Gouda.

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Art Teacher

Betsy Steel

Betsy Steel joins the Diener School as the Art Teacher following a scaffolding of teaching for over 40 years (preschool to university). She has a Bachelor’s Degree in Fine Arts/ Minor in Science from the University of Maryland, a Master of Science Degree in Education from Johns Hopkins University, and the equivalent of a PhD. Betsy is certified in the state of Maryland, pre-K through 12 in Art, and pre-K through eight in Science and General Studies. She holds an Advanced Professional Status in Science.

After completing close to 25 years with MCPS (grades four and five in General Studies, Middle School Science [Biology, Environmental Science, Earth Science, Physics, Chemistry], for more than 15 years, Betsy also taught Art (pre-K through 12) with MCPS. She wrote and implemented special needs programs at Montgomery College, recreational programs with Montgomery County Recreation Department, and with the Maryland National Capital Park and Planning Commission for Special Education. She received a grant in 2019 as a college professor teaching in China at Sias University (in Fine Arts and American Women’s Art History.) During several of her summers while still holding the position of a Science instructor with MCPS, she worked full-time as a NIST research scientist in the microscopy lab.

Betsy has been a part-time adjunct professor at Frederick Community College in Fine Arts where she has been teaching Ceramics, Painting, Drawing, and Fundamentals of Art from 2020 to the present.

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IT Systems Educator

Marquell Corbet

Marquell joined The Diner School in 2025 as an IT Systems Educator. He earned his Bachelor of Science in Computer Information Systems from Stevenson University in 2024 and went on to achieve his CompTIA A+ certification in 2025. Marquell is excited to begin his first year teaching, where he looks forward to sharing his passion for technology and helping students build valuable skills for the future.

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